Psalmów 42:10 Midrasz: Mekhilta DeRabbi Yishmael & Midrash Tehillim

And whence do you derive (the same for) the upper and the lower waters and the depths? From (Psalms 77:17) "The waters saw You, O G–d; the waters saw You and quaked. The depths quaked as well." "The waters saw You" — These are the waters crossed by Israel, which dried up at the word of the Holy One Blessed be He, viz. (Ibid. 114:3) "The sea saw and fled." "the waters saw You and quaked" — These are the upper waters. "The depths quaked as well" — These are the lower waters. And thus is it written (Ibid. 77:18) "Clouds streamed water; the heavens rumbled" — These are the upper waters. (Ibid.) "Your gravels, too, went out" — These are the lower waters. And it is written (Habakkuk 3:10) "The depths have raised their voice, etc." And when they (the waters of the Red Sea) returned to their place, all the waters of the world followed suit, as it is written (Exodus 14:28) "And the waters returned" — All of the waters in the world returned to their places.

"I say to God, my rock: Those who were in Egypt only did one commandment and left. As for me, all the commandments that I was commanded, I do, even those that I have forgotten. I observe the new moon and celebrate the holiday of Shavuot on the first of the seventh month, on the tenth of the month, and on the fifteenth of the month. What is the (sacrifice) for the seventh month? Is there no seventh month other than this? But you say to me every year that whoever comes, I will redeem. Come and redeem me. I say to God, my rock, why have you forgotten me? Yet, you have written about me, for you are my God, my fortress. Until you redeemed our ancestors from Egypt, they did not give you strength (Exodus 15:2). I will not do so until you redeem me. For you are my God, my strength, and my fortress. And it also says (Jeremiah 16:19): "The Lord is my strength and my fortress." Why do you walk in darkness? Redeem me as you redeemed our ancestors from the oppression they were under. And it also says (Exodus 3:9): "I have surely seen the oppression." I have nothing but oppression. Why do you walk in darkness? Did you not send them redemption, as it says (Psalm 105:26): "Moses, His servant, He sent"? And also, He sent two against them, as it says (Isaiah 43:10): "Behold, My servant, whom I uphold." Therefore, it says, "He sent your light and your truth." God said to them (Malachi 3:23): "Behold, I will send you Elijah the prophet." Here he is! And the second one (Isaiah 42:1): "Behold, My servant whom I support." Therefore, it is said, "He will bring me to the holy mountain, and I will come to the altar of God." What do I have to offer except thanksgiving? And so Asaph says (Psalm 79:13): "But we are Your people, and the sheep of Your pasture."